Gun construction



A. LEGETT ET AL GUN ComTRbcTIoN Filed Feb.

Sept 16, 1924 Patented Sept. 16, 1924.

UNITED STATES ALBERT LEGET'l AND SHARED F. LEGETT, OF JACK SON, MISSISSIPPI.

GUN CONSTRUCTION.

Application filed February 1, 1923. Serial No. 616,425.

To all whom it may concern:

Be it known that we, ALBERT LEGE'IT and.

SHARED F. LEGE'IT, citizens of the United States, residin at Jackson, in the county of Hinds and tate of Mississippi, have invented a new and useful Gun Construction, of which the following is a specification.

This invention relates to fire arms, the primary object of the invention being to provide means to vary the diameter of the bore of a gun barrel to convert the barrel into a choke or cylinder bore, or vice versa, thereby adapting the gun for short or long range firing.

Another object of'the invention is to provide a device of this character for use in connection with the usual gun barrel, whereby a standard gauged barrel may be converted into a cylinder or choke barrel.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departin from the spirit of the invention.

Referring to the drawing Figure 1 is a side elevational view of a gun barrel, parts thereof being broken away to illustrate the links and levers forming a part of the attachment.

Figure 2 is a sectional view 22 of Figure 1.

Figure 3 is a sectional view taken on line 3'-3 of Figure 1. 1

Figure 4 is a sectional view taken on line 44 of Figure 1.

Figure 5 is a sectional view taken on line 5-5 of Figure 1.

Referrin to the drawing in detail, the

taken on line reference c aracter 5 designates a gun bar-- rel which may be of the usual standard bore.

The discharge end of the barrel is formed f with a plurality of slots 6 extending from ,the end thereof and terminating at oints in spaced relation with the end as c early shown by Figure 1 of the drawing so that the wall of the barrel at the discharge end may be contracted or expanded to vary the diameter of the bore.

Positioned on the barrel 5 at a point adjacent to the discharge end thereof, is a sleeve 7 which has a tapered wall 8 designed to contact with the portions of the barrel 5 between the slots 6, to move the section of the barrel towards and away from each other to accomplish the purpose of the invention.

Ribs 9 are formed on. opposite sides of of the barrel but held against lateral movement. I

. A pair of arms indicated at 10 operate in the grooves 13 formed in the under surfaces. of the ribs 9 and have heads 14 disposed in the cut out portions 15 of the sleeves 7 to connect the arms and sleeve so that movement of the arms will produce a rela-. tive movement of the sleeve.

The inner ends of the arms 10' are curved downwardl as at 16 and have pivotal con nection with links 17 that are also pivotally connected with the arms 18 as at 19. Lugs 20 extend laterally from the upper ends of the arms 18 and are disposed in suitable notches formed in the ribs 9, spring members 21 being provided to engage the laterally extendlng lugs .20 and normally hold relation, the rod to which the links 22 and arms 18 are connected is formed with shoulders to restrict lateral movement of the arms or links.

From the foregoing it will be seen that when the housing 12 is moved forward from a position as shown by'Figure lot the drawing, the inclined wall of the sleeve 7 disengages the outer end of the gun barrel allowing the sections between the slots 6 to expand, increasing the diameter of the re. Disposed on the ribs 9, and extending laterally' therefrom in spaced relation with the barrel and are provided with grooves 10 to accommodate the inwardly extended each other are pins 25' which move in the cut out portion 26 formed in the forward end of the lever 27 that is pivotally supported Within the housing 12, there being provided a thumb piece 28 at one end of the lever 27 and extending through one wall of the housing 12, whereby the thumb piece may be operated to release the lever from engagement with a certain pin and permit the housing to be moved.

It is obvious that as the lever 27 is moved to engage a pin 25, the housing will be locked against movement.

Having thus described the invention, What is claimed asnew is 1. In a device of the character described, a gun barrel having longitudinally disposed slots formed at the discharge end thereof, a sleeve having a cam surface adapted to engage the portions of the gun barrel between the slots to. reduce the diameter of the discharge end of the barrel, said sleeve having openings formed adjacent to the inner end thereof, link members having heads positioned in the openings, ribs formed laterally of the gun barrel, a sliding housing having inwardly extended flanges movable between the ribs of each side of the gun barrel, and means in the housing and engaging the inner ends of the link members for moving the sleeve longitudinally of the gun barrel.

2. In a device of the character described, a gun barrel having longitudinally disposed slots formed at the discharge end thereof, a sleeve having cams formed thereon and adapted to engage the portion of the gun barrel between the slots to reduce thediameter of the gun barrel, said sleeve having openings, link members having heads positioned in the openings and arranged on opposite sides of the sleeve, a housing movable longitudinally of'the gun barrel, link members having connection with the first mentioned link members and having pivotal connection with the housing to move the sleeve longitudinally of the gun barrel.

' In testimony that We claim the foregoing as our own, We have hereto ailixed our signatures.

' ALBERT LEGETT.

SHARED 'F. LEGETT. 

